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GDU 37X Installation Manual – Appendix B Page B-1
190-01054-01 Revision B
APPENDIX B Connector Installation Instructions
CAUTION
This instruction manual assumes skill and knowledge of aircraft harness fabrication
techniques. DO NOT PERFORM THIS INSTALLATION IF YOU ARE
UNQUALIFIED.
NOTE
The GDU 37X rear connector (J3701) is electrically isolated. For installations using
shielded cables, a ground pin must be tied to the connector shell.
B.1 Jackscrew Backshell Installation Instructions
B.1.1 Shield Block Installation Parts
Tables B-1 and B-2 list the parts needed to install a Shield Block. Parts listed in Table B-1 are supplied
in the GDU 37X Connector Kit (011-01921-00). Parts listed in Table B-2 are to be provided by the
installer.
Table B-1. Parts supplied for a Shield Block Installation (Figure B-1)
Figure
Ref
Description GPN or MIL spec
1 Cast Backshell Housing 125-00175-00
6 Contacts 336-00094-00
12 Clamp 115-01078-04
13 Screw,4-40x.375,PHP,SS/P,w/Nylon 211-60234-10
14 Cover 115-01079-04
15 Screw,4-40x.187,FLHP100,SS/P,w/Nylon 211-63234-06
Table B-2. Parts not supplied for a Shield Block Installation (Figure B-1)
Figure
Ref
Description GPN or MIL spec
2 Multiple Conductor Shielded Cable (2-conductor shown in Figure B-1)
Parts used depend
on method chosen
3 Drain Wire Shield Termination (method optional)
Parts used depend
on method chosen
4
Braid, Flat (19-20 AWG equivalent, tinned plated copper strands 36
AWG, Circular Mil Area 1000 -1300)
Parts used depend
on method chosen
5 Floating Shield Termination (method optional)
Parts used depend
on method chosen
Ring terminal, #8, insulated, 18-22 AWG MS25036-149
Ring terminal, #8, insulated, 14-16 AWG MS25036-153
7
Ring terminal, #8, insulated, 10-12 AWG MS25036-156
Screw, PHP, 8-32x.312", Stainless MS51957-42
8
Screw, PHP, 8-32x.312", Cad Plated Steel MS35206-242
Split Washer, #8, (.045" compressed thickness) Stainless MS35338-137
9
Split Washer, #8, (.045" compressed thickness) Cad-plated steel MS35338-42